加测竖角的双点后方交会三维定位

Three-dimensional position by two-point intersection involves two vertical angles

定位技术在林业工作中起着重要的作用,同时由于林地的广阔、闭郁及交通不便等特点又给定位工作提出新的要求。从经济性和实用性出发,本文讨论一种加测倾角的双点后方交会三维定位方法。其主要特点是只在待定点上安置一次仪器,对两个已知点观测三个参数,即两个竖直角和一个水平角,与常用的前方交会、后方交会定位方法相比,其观测数据少,同时,解决林区定位通视条件困难给定位工作带来的困难。文中对相关三维后方交会的数学模型进行了推证,并根据实例进行了误差分析。

Position technology has been playing an important role in forestry,and the new challenges have presented to us because of the expanse,obstruction and amplitude of forestry fields.In view of the economy and practicability,an effective method of three-dimensional position by two-point resection involveing two vertical angles has been discussed in this paper.The characteristic is that we set up the instruments on unknown point for once,observe three parameters including two vertical angles and one horizontal angle.It has less measure data than common methods,and it can solve the position difficulties of sight line in forestry fields.The mathematic modes have been proved in this paper and the precision has been analysed base on the example.